21421375

素因数分解:

$5^3\times {\mathrm{409}}^1\times {\mathrm{419}}^1$

素因数の和:843

約数の個数: 16

約数和(自身を含む): 26863200

約数和(自身を除く): 5441825

約数列:

[1, 5, 25, 125, 409, 419, 2045, 2095, 10225, 10475, 51125, 52375, 171371, 856855, 4284275, 21421375]

約数ペア:

[(1, 21421375), (5, 4284275), (25, 856855), (125, 171371), (409, 52375), (419, 51125), (2045, 10475), (2095, 10225)]